Lloyd solves the equation 24x + 18(x - 2) = 216 for x. Some of his steps are shown.
Step 1: 24x + 18(x - 2) = 216
Step 2: 24x + 18x - 36 = 216
Step 3: 42x - 36 = 216
Step 4: 42x = 252
a:combined like terms
b:used the distributive property
c:used the addition property equality
d:used the multiplicative inverse of property